What is the typical flow rate of commonly used master stream devices?

The typical flow rate of commonly used master stream devices usually falls within the range of 350 to 1000 gallons per minute (gpm). Master stream devices are used in firefighting to deliver large volumes of water to suppress fires effectively, especially in situations that require significant water flow, such as large structure fires or wildland fires.

This flow rate is considered standard for many master streams, enabling firefighters to combat fires more efficiently. Devices such as tower monitors, deck guns, and aerial apparatus are examples of master stream appliances designed to achieve these flow rates. The ability to provide this level of water flow is critical for effectively cooling hot gases, saturating fuels, and preventing fire spread in larger incidents.